42" touch screen monitor, The perfect solution integrating touch function and LCD display. RS232 or USB touch interface 42inch touch screen monitorModel No.KDT- ... supportedTouchscreen TypeKAL-0420-4B:42 SAW 4MM thickness of touch screen sensor;Touchscreen DurabilityScratch-free; More than 50,000,000 ... SA4B; RS232 for KDT-0420S-SA4BCertificatesFCC,CE,CCC 42" touch screen monitor with SAW touch panel